When users have multiple Microsoft Entra tenants, they are prompted to manually select a tenant during sign-in. This can be bypassed by adding a `domain_hint` query parameter to the OpenID Connect authorization request, set to the target tenant's domain. Alternatively, `login_hint` can be used to pre-fill the user's email. For Angular apps using the `angular-auth-oidc-client` library, this is configured via the `customParamsAuthRequest` property in `OpenIdConfiguration`, or dynamically via the `customParams` property when calling `authorize`.
